# Quartermaster Pro vs ECAO

Quartermaster Pro and ECAO are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Quartermaster Pro ships an update every 2 weeks, ECAO every 3 weeks. The most recent releases landed on October 24, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Quartermaster Pro | ECAO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Size | 69 MB | 30 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Quartermaster Inc](https://appshunter.io/developer/1276175408) | [Electrical Contractors Association of Ontario](https://appshunter.io/developer/1569336021) |

## What reviewers say

### Quartermaster Pro

[App page](https://appshunter.io/ios/app/quartermaster-pro/id1450279391)

**Features:** Vision Pro support

**In-app purchases:** none


### ECAO

[App page](https://appshunter.io/ios/app/ecao/id1569336019)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Quartermaster Pro free?

Quartermaster Pro is free to download, with no in-app purchases.

### Is ECAO free?

ECAO is free to download, with no in-app purchases.

### Do Quartermaster Pro or ECAO have ads?

Neither Quartermaster Pro nor ECAO shows ads.

### Which is updated more often, Quartermaster Pro or ECAO?

Quartermaster Pro ships an update every 2 weeks, and ECAO every 3 weeks. Most recently, Quartermaster Pro was updated on October 24, 2026 and ECAO on September 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*